Editing createCircularRgn - FilterMeisterWiki

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= createCircularRgn =

== Syntax ==
{{region createCircularRgn(int x, int y, int d)}}

== Arguments ==
:'''x'''
::x defines abscissa (in DBUs) of upper-left corner of the bounding box (not the circle’s center!).
:'''y'''
::y defines ordinate (in DBUs) of upper-left corner of the bounding box (not the circle’s center!).
:'''d'''
::d defines the circle’s diameter

== Return ==
Returns a handle/pointer to a circular region object (see comments)

== Description ==
Allows to define a rounded circular visual region, that can be for instance handled by the functions ((refreshRgn)) or ((setDialogRegion)).

== Example ==
<code>
setDialogRegion( createCircularRgn(20, 20, 200) );
</code>

== Comments ==
"region" corresponds to a particular FM type or object that might need to be better documented or defined. You can't directly cast it to an integer, despite it behaving like an integer.
createCircularRgn is a wrapper around the Windows Win32 built-in function CreateEllipticRgn, documented here: https://msdn.microsoft.com/en-us/library/windows/desktop/dd183496(v=vs.85).aspx

== Also see ==
((createEllipticRgn)), ((createRectRgn)), ((createRoundRectRgn)), ((createCircularRgn)), ((createPolyRgn)), ((refreshRgn)), ((setDialogRegion))

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